文字、声音、图像等各种媒体信息本身是模拟的，只有数字化后才能由计算机平台进行各种处理和综合。实现对多媒体信息的交互处理，必须对各种媒体进行数字化，而文字、声音、图像等数字化信息的数据十分庞大，不仅造成存贮和传输的困难，而且计算机的总线也不能承受，尽管有许多方法可以提高计算机的传输能力，但都不能彻底解决问题。-Text, sound, images and other media information itself is analog only digital before processing by the various computer platforms and integrated. Realize the interactive multimedia information processing, the various media must be digital, and text, sound, images and other digital information of data is enormous, not only caused difficulties in storage and transmission, but can not afford the computer bus, despite many method can improve the transmission capacity of the computer, but can not completely solve the problem.